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FUJITSU MAP3735FC User Manual

Page 57

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4.1 Mounting Requirements

C141-E163

4-5

(3)

Limitation of bottom-mounting
Use all 4 mounting holes on the bottom face.

(4)

Environmental temperature

Temperature condition at installed in a cabinet is indicated with ambient temperature measured 3 cm
from the disk drive. At designing the system cabinet, consider following points.

Make a suitable air flow so that the DE surface temperature does not exceed 60°C.

Cool the PCA side especially with air circulation inside the cabinet. Confirm the cooling effect

by measuring temperature of specific ICs and the DE. These measurement results should be
within a criteria listed in Table 4.1.

Keeping the DE surface temperature at 50

°

C or lower, which is a condition for assuring an

MTBF of 1,200,000 hours, requires an air flow of 0.7 m/s.

Table 4.1

Surface temperature check point

No.

Measurement point

Criteria

1

Center of DE cover

60°C

2

Read channel LSI

88°C

3

VCM/SPM Driver

92°C

4

HDC

90°C

5

MPU

91°C

1

2

4

5

3

Figure 4.5

Surface temperature measurement points

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